1 | // This file is part of Eigen, a lightweight C++ template library |
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2 | // for linear algebra. |
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3 | // |
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4 | // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> |
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5 | // |
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6 | // This Source Code Form is subject to the terms of the Mozilla |
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7 | // Public License v. 2.0. If a copy of the MPL was not distributed |
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8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. |
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9 | |
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10 | #ifndef EIGEN_SPARSEREDUX_H |
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11 | #define EIGEN_SPARSEREDUX_H |
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12 | |
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13 | namespace Eigen { |
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14 | |
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15 | template<typename Derived> |
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16 | typename internal::traits<Derived>::Scalar |
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17 | SparseMatrixBase<Derived>::sum() const |
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18 | { |
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19 | eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); |
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20 | Scalar res(0); |
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21 | for (Index j=0; j<outerSize(); ++j) |
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22 | for (typename Derived::InnerIterator iter(derived(),j); iter; ++iter) |
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23 | res += iter.value(); |
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24 | return res; |
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25 | } |
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26 | |
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27 | template<typename _Scalar, int _Options, typename _Index> |
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28 | typename internal::traits<SparseMatrix<_Scalar,_Options,_Index> >::Scalar |
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29 | SparseMatrix<_Scalar,_Options,_Index>::sum() const |
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30 | { |
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31 | eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); |
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32 | return Matrix<Scalar,1,Dynamic>::Map(&m_data.value(0), m_data.size()).sum(); |
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33 | } |
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34 | |
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35 | template<typename _Scalar, int _Options, typename _Index> |
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36 | typename internal::traits<SparseVector<_Scalar,_Options, _Index> >::Scalar |
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37 | SparseVector<_Scalar,_Options,_Index>::sum() const |
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38 | { |
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39 | eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); |
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40 | return Matrix<Scalar,1,Dynamic>::Map(&m_data.value(0), m_data.size()).sum(); |
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41 | } |
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42 | |
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43 | } // end namespace Eigen |
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44 | |
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45 | #endif // EIGEN_SPARSEREDUX_H |
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